qmutex_linux.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Copyright (C) 2016 Intel Corporation.-
5** Contact: https://www.qt.io/licensing/-
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39****************************************************************************/-
40-
41#include "qplatformdefs.h"-
42#include "qmutex.h"-
43-
44#ifndef QT_NO_THREAD-
45#include "qatomic.h"-
46#include "qmutex_p.h"-
47#include "qelapsedtimer.h"-
48-
49#include <linux/futex.h>-
50#include <sys/syscall.h>-
51#include <unistd.h>-
52#include <errno.h>-
53#include <asm/unistd.h>-
54-
55#ifndef QT_LINUX_FUTEX-
56# error "Qt build is broken: qmutex_linux.cpp is being built but futex support is not wanted"-
57#endif-
58-
59#ifndef FUTEX_PRIVATE_FLAG-
60# define FUTEX_PRIVATE_FLAG 0-
61#endif-
62-
63-
64QT_BEGIN_NAMESPACE-
65-
66/*-
67 * QBasicMutex implementation on Linux with futexes-
68 *-
69 * QBasicMutex contains one pointer value, which can contain one of four-
70 * different values:-
71 * 0x0 unlocked, non-recursive mutex-
72 * 0x1 locked non-recursive mutex, no waiters-
73 * 0x3 locked non-recursive mutex, at least one waiter-
74 * > 0x3 recursive mutex, points to a QMutexPrivate object-
75 *-
76 * LOCKING (non-recursive):-
77 *-
78 * A non-recursive mutex starts in the 0x0 state, indicating that it's-
79 * unlocked. When the first thread attempts to lock it, it will perform a-
80 * testAndSetAcquire from 0x0 to 0x1. If that succeeds, the caller concludes-
81 * that it successfully locked the mutex. That happens in fastTryLock().-
82 *-
83 * If that testAndSetAcquire fails, QBasicMutex::lockInternal is called.-
84 *-
85 * lockInternal will examine the value of the pointer. Otherwise, it will use-
86 * futexes to sleep and wait for another thread to unlock. To do that, it needs-
87 * to set a pointer value of 0x3, which indicates that thread is waiting. It-
88 * does that by a simple fetchAndStoreAcquire operation.-
89 *-
90 * If the pointer value was 0x0, it means we succeeded in acquiring the mutex.-
91 * For other values, it will then call FUTEX_WAIT and with an expected value of-
92 * 0x3.-
93 *-
94 * If the pointer value changed before futex(2) managed to sleep, it will-
95 * return -1 / EWOULDBLOCK, in which case we have to start over. And even if we-
96 * are woken up directly by a FUTEX_WAKE, we need to acquire the mutex, so we-
97 * start over again.-
98 *-
99 * UNLOCKING (non-recursive):-
100 *-
101 * To unlock, we need to set a value of 0x0 to indicate it's unlocked. The-
102 * first attempt is a testAndSetRelease operation from 0x1 to 0x0. If that-
103 * succeeds, we're done.-
104 *-
105 * If it fails, unlockInternal() is called. The only possibility is that the-
106 * mutex value was 0x3, which indicates some other thread is waiting or was-
107 * waiting in the past. We then set the mutex to 0x0 and perform a FUTEX_WAKE.-
108 */-
109-
110static QBasicAtomicInt futexFlagSupport = Q_BASIC_ATOMIC_INITIALIZER(-1);-
static int checkFutexPrivateSupport()
{
int value = 0;
#if defined(FUTEX_PRIVATE_FLAG)
Q_STATIC_ASSERT(FUTEX_PRIVATE_FLAG != 0x80000000);
value = syscall(__NR_futex, &futexFlagSupport,
FUTEX_WAKE | FUTEX_PRIVATE_FLAG,
42, 0, 0, 0);
if (value != -1)
value = FUTEX_PRIVATE_FLAG;
else
value = 0;
#else
value = 0;
#endif
futexFlagSupport.store(value);
111-
return value;
}
static inline int futexFlags()
{
int value = futexFlagSupport.load();
if (Q_LIKELY(value != -1))
return value;
return checkFutexPrivateSupport();
}static inline int _q_futex(void *addr, int op, int val, const struct timespec *timeout) Q_DECL_NOTHROW
113{-
114 volatile int *int_addr = reinterpret_cast<volatile int *>(addr);-
115#if Q_BYTE_ORDER == Q_BIG_ENDIAN && QT_POINTER_SIZE == 8-
116 int_addr++; //We want a pointer to the 32 least significant bit of QMutex::d-
117#endif-
118 int *addr2 = 0;-
119 int val2 = 0;-
120-
121 // we use __NR_futex because some libcs (like Android's bionic) don't-
122 // provide SYS_futex etc.-
123 return syscall(__NR_futex, int_addr, op | futexFlags(),FUTEX_PRIVATE_FLAG, val, timeout, addr2, val2);
executed 11649591 times by 934 tests: return syscall(202, int_addr, op | 128, val, timeout, addr2, val2);
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
11649591
124}-
125-
126static inline QMutexData *dummyFutexValue()-
127{-
128 return reinterpret_cast<QMutexData *>(quintptr(3));-
129}-
130-
131template <bool IsTimed> static inline-
132bool lockInternal_helper(QBasicAtomicPointer<QMutexData> &d_ptr, int timeout = -1, QElapsedTimer *elapsedTimer = 0) Q_DECL_NOTHROW-
133{-
134 if (!IsTimed)
!IsTimedDescription
TRUEevaluated 3882900 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
FALSEevaluated 264473 times by 22 tests
Evaluated by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
264473-3882900
135 timeout = -1;
executed 3882900 times by 934 tests: timeout = -1;
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3882900
136-
137 // we're here because fastTryLock() has just failed-
138 if (timeout == 0)
timeout == 0Description
TRUEevaluated 262259 times by 22 tests
Evaluated by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
FALSEevaluated 3885114 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
262259-3885114
139 return false;
executed 262259 times by 22 tests: return false;
Executed by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
262259
140-
141 struct timespec ts, *pts = 0;-
142 if (IsTimed && timeout > 0) {
IsTimedDescription
TRUEevaluated 2214 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 3882900 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
timeout > 0Description
TRUEevaluated 2210 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 4 times by 1 test
Evaluated by:
  • tst_QMutex
4-3882900
143 ts.tv_sec = timeout / 1000;-
144 ts.tv_nsec = (timeout % 1000) * 1000 * 1000;-
145 }
executed 2210 times by 1 test: end of block
Executed by:
  • tst_QMutex
2210
146-
147 // the mutex is locked already, set a bit indicating we're waiting-
148 while (d_ptr.fetchAndStoreAcquire(dummyFutexValue()) != 0) {
d_ptr.fetchAnd...xValue()) != 0Description
TRUEevaluated 3885773 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
FALSEevaluated 3883721 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3883721-3885773
149 if (IsTimed && pts == &ts) {
IsTimedDescription
TRUEevaluated 2272 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 3883501 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
pts == &tsDescription
TRUEevaluated 58 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 2214 times by 1 test
Evaluated by:
  • tst_QMutex
58-3883501
150 // recalculate the timeout-
151 qint64 xtimeout = qint64(timeout) * 1000 * 1000;-
152 xtimeout -= elapsedTimer->nsecsElapsed();-
153 if (xtimeout <= 0) {
xtimeout <= 0Description
TRUEevaluated 33 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 25 times by 1 test
Evaluated by:
  • tst_QMutex
25-33
154 // timer expired after we returned-
155 return false;
executed 33 times by 1 test: return false;
Executed by:
  • tst_QMutex
33
156 }-
157 ts.tv_sec = xtimeout / Q_INT64_C(1000) / 1000 / 1000;-
158 ts.tv_nsec = xtimeout % (Q_INT64_C(1000) * 1000 * 1000);-
159 }
executed 25 times by 1 test: end of block
Executed by:
  • tst_QMutex
25
160 if (IsTimed && timeout > 0)
IsTimedDescription
TRUEevaluated 2239 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 3883501 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
timeout > 0Description
TRUEevaluated 2235 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 4 times by 1 test
Evaluated by:
  • tst_QMutex
4-3883501
161 pts = &ts;
executed 2235 times by 1 test: pts = &ts;
Executed by:
  • tst_QMutex
2235
162-
163 // successfully set the waiting bit, now sleep-
164 int r = _q_futex(&d_ptr, FUTEX_WAIT, quintptr(dummyFutexValue()), pts);-
165 if (IsTimed && r != 0 && errno == ETIMEDOUT)
IsTimedDescription
TRUEevaluated 2239 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 3883501 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
r != 0Description
TRUEevaluated 1360 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEevaluated 879 times by 1 test
Evaluated by:
  • tst_QMutex
(*__errno_location ()) == 110Description
TRUEevaluated 1360 times by 1 test
Evaluated by:
  • tst_QMutex
FALSEnever evaluated
0-3883501
166 return false;
executed 1360 times by 1 test: return false;
Executed by:
  • tst_QMutex
1360
167-
168 // we got woken up, so try to acquire the mutex-
169 // note we must set to dummyFutexValue because there could be other threads-
170 // also waiting-
171 }
executed 3884380 times by 934 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3884380
172-
173 Q_ASSERT(d_ptr.load());-
174 return true;
executed 3883721 times by 934 tests: return true;
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3883721
175}-
176-
177void QBasicMutex::lockInternal() Q_DECL_NOTHROW-
178{-
179 Q_ASSERT(!isRecursive());-
180 lockInternal_helper<false>(d_ptr);-
181}
executed 3882900 times by 934 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3882900
182-
183bool QBasicMutex::lockInternal(int timeout) Q_DECL_NOTHROW-
184{-
185 Q_ASSERT(!isRecursive());-
186 QElapsedTimer elapsedTimer;-
187 elapsedTimer.start();-
188 return lockInternal_helper<true>(d_ptr, timeout, &elapsedTimer);
executed 264473 times by 22 tests: return lockInternal_helper<true>(d_ptr, timeout, &elapsedTimer);
Executed by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
264473
189}-
190-
191void QBasicMutex::unlockInternal() Q_DECL_NOTHROW-
192{-
193 QMutexData *d = d_ptr.load();-
194 Q_ASSERT(d); //we must be locked-
195 Q_ASSERT(d != dummyLocked()); // testAndSetRelease(dummyLocked(), 0) failed-
196 Q_UNUSED(d);-
197 Q_ASSERT(!isRecursive());-
198-
199 d_ptr.storeRelease(0);-
200 _q_futex(&d_ptr, FUTEX_WAKE, 1, 0);-
201}
executed 7763193 times by 935 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
7763193
202-
203-
204QT_END_NAMESPACE-
205-
206#endif // QT_NO_THREAD-
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